from Marguerite Bennett @EvilMarguerite
When they were trying to bring Puffins back to islands on the US east coast they decided to do so with dummies. Puffins are very social, and as a result would want to land on islands that already have puffins. The dummies looked real from a distance, but were seriously lacking up close, held up by a single peg. Puffins, being social and wanting to fit in, followed suit.